CN216025879U

CN216025879U - Battery core pole piece coating device

Info

Publication number: CN216025879U
Application number: CN202122024554.3U
Authority: CN
Inventors: 姜冠华; 岳进; 巫章林; 刘艳林; 董兴佐; 刘瑞
Original assignee: Yibin Zhongbang New Energy Co ltd
Current assignee: Yibin Zhongbang New Energy Co ltd
Priority date: 2021-08-25
Filing date: 2021-08-25
Publication date: 2022-03-15
Anticipated expiration: 2031-08-25

Abstract

The utility model relates to the technical field of battery manufacturing equipment, in particular to a battery core pole piece coating device which comprises a slurry tank, an immersion roller, a squeezing roller and a plurality of guide rollers. The immersion roller is arranged inside the slurry tank. The squeeze rollers are arranged in pairs. The extrusion rollers are distributed right above the slurry tank. The electrode plates pass through the immersing roller and then pass through the extruding roller by the guide rollers. The battery cell pole piece coating device presses the electrode plate downwards into the slurry through the immersion roller, so that the slurry is attached to the two sides of the electrode plate. The slurry can be rolled and flattened by rolling through the extrusion roller. This allows the coating of both sides of the electrode plate to be performed simultaneously. Thereby greatly improving the coating efficiency. In addition, the squeezing roller is arranged right above the slurry tank, so that the redundant slurry intercepted by the squeezing roller directly falls to the slurry tank for recycling.

Description

Battery core pole piece coating device

Technical Field

The utility model relates to the technical field of battery manufacturing equipment, in particular to a coating device for a battery core pole piece.

Background

During the production of the battery, coating operation needs to be carried out on the electrode plates. For the case where two-sided coating is required, the prior art is generally carried out in two passes. This results in an increase in production flow and a low production efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a coating device for a battery cell pole piece, which can coat two sides of an electrode piece at the same time and improve the production efficiency.

The embodiment of the utility model is realized by the following technical scheme:

a coating device for a battery cell pole piece comprises a slurry tank, an immersion roller, an extrusion roller and a plurality of guide rollers; the immersion roller is arranged inside the slurry tank; the extrusion rollers are arranged in pairs; the extrusion rollers are distributed right above the slurry tank; and the electrode plates pass through the immersion roller and then pass through the extrusion roller by the guide rollers.

Further, the device also comprises two material driving plates; a gap for the electrode plate to pass through is arranged between the two material expelling plates; and the material driving plate is arranged behind the immersion roller along the moving direction of the electrode plate.

Furthermore, the material driving plate is provided with a sliding groove in a matching manner, so that the material driving plate can slide along the sliding groove; the sliding groove is perpendicular to the moving direction of the electrode plate.

Further, the squeezing rollers are provided with a plurality of pairs; a plurality of pairs of the squeezing rollers are distributed along the horizontal direction.

Furthermore, one end of each extrusion roller is provided with a transmission gear; two transmission gears of the two squeezing rollers of each pair are meshed; one transmission gear in each pair of two squeezing rollers is connected with a driving motor through a transmission chain.

Furthermore, both ends of the immersion roller are provided with guide grooves; the diversion trench is arranged in a ring shape; the depth direction of the diversion trench is vertical to the axial direction of the immersion roller; the liquid level in the slurry tank is lower than the lowest height of the opening of the diversion trench.

Further, the liquid level in the slurry tank is higher than the height of the tangent point of the rear end of the electrode plate and the immersion roller.

The technical scheme of the embodiment of the utility model at least has the following advantages and beneficial effects:

when the coating device for the battery cell pole piece is used, the electrode piece is guided by the guide roller, so that the electrode piece firstly passes through the immersion roller and then passes between the pair of extrusion rollers. When the electrode slice passes through the immersion roller, the electrode slice is guided by the immersion roller and is pressed down to the slurry tank, and then the two sides of the electrode slice move to a position between the pair of squeezing rollers after passing through the slurry in the slurry tank. This causes slurry to adhere to both sides of the electrode sheet. When the electrode plate attached with the slurry moves to a position between the pair of squeezing rollers, the two squeezing rollers roll the two sides of the electrode plate, so that the slurry on the two sides of the electrode plate is rolled and leveled, and the coating operation is finished.

This kind of electric core pole piece coating device pushes down the electrode slice to inside the thick liquid through the submergence cylinder, and then makes the electrode slice both sides all adhere to there is the thick liquid. The slurry can be rolled and flattened by rolling through an extrusion roller; this allows coating of both sides of the electrode sheet to be performed simultaneously. Thereby greatly improving the coating efficiency. In addition, the squeezing roller is arranged right above the slurry tank, so that the redundant slurry intercepted by the squeezing roller directly falls to the slurry tank for recycling.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a battery cell pole piece coating apparatus provided by the present invention;

FIG. 2 is an enlarged view of the point a in FIG. 1;

FIG. 3 is a schematic view of the engagement of the transmission gear with the driving motor;

fig. 4 is a schematic view of the immersion cylinder.

Icon: 1-slurry tank, 2-immersion roller, 21-diversion tank, 3-extrusion roller, 31-transmission gear, 4-guide roller, 5-electrode plate, 6-material-driving plate, 7-sliding groove, 8-transmission chain and 9-driving motor.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the product of this application is used, the description is merely for convenience and simplicity of description, and it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

as shown in fig. 1-4, the utility model provides a coating apparatus for a battery cell pole piece, which comprises a slurry tank 1, an immersion roller 2, a squeezing roller 3 and a plurality of guide rollers 4. The slurry tank 1 is used for containing slurry. The immersion cylinder 2 is disposed inside the slurry tank 1. Specifically, two ends of the immersion roller 2 are connected to two opposite side walls of the slurry tank 1 through bearings. The pressing rollers 3 are provided in pairs. The two squeeze rollers 3 in pairs are distributed up and down. A gap is left between the two. The squeezing rollers 3 are distributed right above the slurry tank 1. The electrode plates 5 pass through the immersing roller 2 and then pass through the pressing roller 3 by a plurality of guide rollers 4. Specifically, two guide rollers 4 are provided above the slurry tank 1 and the two guide rollers 4 are located on both sides of the submerged roller 2 in the horizontal direction. The electrode sheet 5 is deflected downwardly past a guide roller 4 and extends below the immersion roller 2. The electrode sheet 5 is deflected upward after passing under the submerged roller 2, and the electrode sheet 5 is guided to a gap between the paired two pressing rollers 3 by another guide roller 4. In order to enable the slurry to be better attached to both sides of the electrode sheet 5, two immersion cylinders 2 may be provided. The electrode sheet 5 moves horizontally a distance below the liquid level of the slurry under the action of the two immersion cylinders 2. So that the slurry can better cover both sides of the electrode sheet 5.

When the coating device for the battery cell pole piece is used, the electrode piece 5 is guided by the guide roller 4, so that the electrode piece 5 firstly passes through the immersion roller 2 and then passes between the pair of extrusion rollers 3. When the electrode slice 5 passes through the immersion roller 2, the electrode slice 5 is guided by the immersion roller 2 and is pressed down into the slurry tank 1, and then the two sides of the electrode slice 5 move to between the pair of squeezing rollers 3 after passing through the slurry in the slurry tank 1. This causes slurry to adhere to both sides of the electrode sheet 5. When the electrode sheet 5 with the slurry attached thereto moves between the pair of squeeze rollers 3, the two squeeze rollers 3 roll both sides of the electrode sheet 5, so that the slurry on both sides of the electrode sheet 5 is rolled and leveled, thereby completing the coating operation.

This kind of electric core pole piece coating device pushes down electrode slice 5 through submergence cylinder 2 inside to the thick liquid, and then makes electrode slice 5 both sides all adhere to there is the thick liquid. The slurry is rolled flat by rolling with the pressing roller 3. This allows the coating of both sides of the electrode sheet 5 to be performed simultaneously. Thereby greatly improving the coating efficiency. In addition, the squeezing roller 3 is arranged right above the slurry tank 1, so that the excessive slurry intercepted by the squeezing roller 3 directly falls to the slurry tank 1 for reuse.

In this embodiment, two material driving plates 6 are further included. A gap for the electrode slice 5 to pass through is arranged between the two material driving plates 6. The material expelling plate 6 is arranged behind the immersion roller 2 along the moving direction of the electrode slice 5. That is, the slurry adhering to both sides of the electrode sheet 5 is flushed out when passing through the material-driving plate 6, and the excess slurry is stopped by the material-driving plate 6 and falls back to the slurry tank 1. Avoiding excess slurry from reaching the squeeze cylinders 3.

In this embodiment, the material driving plate 6 is provided with a sliding groove 7 in a matching manner, so that the material driving plate 6 can slide along the sliding groove 7. In particular, the chute 7 may be provided in a frame (not shown). The slide groove 7 is perpendicular to the moving direction of the electrode sheet 5. When the material driving plates 6 slide along the sliding grooves 7, the distance between the two material driving plates 6 and the electrode plates 5 is changed. The clearance between the electrode plate 5 and the material driving plate 6 can be adjusted by adjusting the material driving plate 6, and then the thickness of the slurry on two sides of the electrode plate 5 can be adjusted according to the requirement.

In the present embodiment, the pressing rollers 3 are provided in several pairs. Several pairs of squeezing rollers 3 are distributed in the horizontal direction. The electrode plates 5 are extruded by the extrusion rollers 3 for multiple times, so that the slurry on two sides of the electrode plates 5 is extruded to be more smooth, and the coating quality is good. Simultaneously, a plurality of squeeze rolls 3 distribute along the horizontal direction and also make electrode slice 5 can not lead to electrode slice 5 to deflect from top to bottom and receive the extrusion force because of a plurality of squeeze rolls 3 are uneven when passing through squeeze roll 3, and then the thick liquid of better assurance electrode slice 5 both sides is level and smooth and thickness is balanced.

In this embodiment, one end of each of the pressing rollers 3 is provided with a transmission gear 31. The two transmission gears 31 of the two pressing cylinders 3 of each pair mesh. This results in the same rotational speed of the two press cylinders 3 of each pair. One drive gear 31 of each pair of two press cylinders 3 is connected to a drive motor 9 via a drive chain 8. Therefore, the rotating speeds of the extrusion rollers 3 are the same, the electrode plates 5 are stressed evenly, and the coating quality is stable and balanced.

In this embodiment, the two ends of the immersion drum 2 are provided with diversion trenches 21. The diversion trench 21 is arranged in a ring shape. The depth direction of the baffle groove 21 is perpendicular to the axial direction of the immersion drum 2. The liquid level in the slurry tank 1 is lower than the lowest height of the opening of the diversion trench 21. This is so that the slurry does not flood the axis of rotation of the submerged drum 2. Meanwhile, the slurry on the surface of the submerged drum 2 flows downwards and is intercepted by the diversion trench 21 to flow to the slurry tank 1. These are all effective in preventing slurry from entering the shaft.

In this embodiment, the liquid level in the slurry tank 1 is higher than the height of the tangent point between the rear end of the electrode plate 5 and the immersion drum 2. This enables the slurry to reach the side of the electrode plate 5 that is attached to the immersion cylinder 2, thereby ensuring that slurry adheres to both sides of the electrode plate 5.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a battery pole piece coating unit which characterized in that: comprises a slurry tank (1), an immersion roller (2), a squeezing roller (3) and a plurality of guide rollers (4); the immersion roller (2) is arranged inside the slurry tank (1); the squeezing rollers (3) are arranged in pairs; the squeezing rollers (3) are horizontally distributed right above the slurry tank (1); the electrode plates (5) pass through the immersion roller (2) and then pass through the extrusion roller (3) through the guide rollers (4).

2. The coating device for the battery core pole piece of claim 1, wherein: the device also comprises two material expelling plates (6); a gap for the electrode slice (5) to pass through is arranged between the two material expelling plates (6); along the moving direction of the electrode slice (5), the material driving plate (6) is arranged behind the immersion roller (2).

3. The coating device for the battery core pole piece of claim 2, wherein: the material driving plate (6) is provided with a sliding chute (7) in a matching way, so that the material driving plate (6) can slide along the sliding chute (7); the sliding groove (7) is perpendicular to the moving direction of the electrode plate (5).

4. The coating device for the battery core pole piece of claim 3, wherein: the extrusion rollers (3) are provided with a plurality of pairs; a plurality of pairs of the extrusion rollers (3) are distributed along the horizontal direction.

5. The coating device for the battery core pole piece of claim 4, wherein: one end of each extrusion roller (3) is provided with a transmission gear (31); two transmission gears (31) of the two squeezing rollers (3) of each pair are meshed; one transmission gear (31) in each pair of two squeezing rollers (3) is connected with a driving motor (9) through a transmission chain (8).

6. The coating device for the battery core pole piece of claim 5, wherein: both ends of the immersion roller (2) are provided with diversion trenches (21); the diversion trench (21) is arranged in a ring shape; the depth direction of the diversion trench (21) is vertical to the axial direction of the immersion roller (2); the liquid level in the slurry tank (1) is lower than the lowest height of the opening of the diversion trench (21).

7. The coating device for the battery core pole piece of claim 6, wherein: the liquid level in the slurry tank (1) is higher than the height of the tangent point of the rear end of the electrode plate (5) and the immersion roller (2).